Technical facts

Operating system(s) or programming environment(s)

Lubuntu 15.04 (vivid)

IDE(s):

Qt Creator 3.1.1

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.9.2

Libraries used:

STL: GNU ISO C++ Library, version 4.9.2

Qt project file: ./CppGetPath/CppGetPath.pro


include(../../ConsoleApplication.pri) #Or use the code below

# QT += core

# QT += gui

# greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

# CONFIG   += console

# CONFIG   -= app_bundle

# TEMPLATE = app

# CONFIG(release, debug|release) {

#   DEFINES += NDEBUG NTRACE_BILDERBIKKEL

# }

# QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++

# unix {

#   QMAKE_CXXFLAGS += -Werror

# }



include(../../Libraries/BoostAll.pri)



SOURCES += main.cpp

./CppGetPath/main.cpp


#include <cassert>

#include <string>



#pragma GCC diagnostic push

#pragma GCC diagnostic ignored "-Weffc++"

#pragma GCC diagnostic ignored "-Wunused-local-typedefs"

#include <boost/filesystem.hpp>

#include <boost/xpressive/xpressive.hpp>

#pragma GCC diagnostic pop



///Returns the path of a filename

///From http://www.richelbilderbeek.nl/CppGetPath.htm

const std::string GetPathStl(const std::string& filename)

{

  const int a = filename.rfind("\\",filename.size());

  const int b = filename.rfind("/",filename.size());

  const int i = std::max(a,b);

  assert(i < static_cast<int>(filename.size()));

  return filename.substr(0,i);

}



///Returns the path of a filename

//From http://www.richelbilderbeek.nl/CppGetPath.htm

const std::string GetPathBoostFilesystem(const std::string& filename)

{

  return boost::filesystem::path(filename).parent_path().string();

}



///Returns the path of a filename

///From http://www.richelbilderbeek.nl/CppGetPath.htm

const std::string GetPathBoostXpressive(const std::string& filename)

{

  const boost::xpressive::sregex rex

    = boost::xpressive::sregex::compile(

      "(.*)(\\\\|/)([A-Za-z\\._]*)" );

  boost::xpressive::smatch what;



  if( boost::xpressive::regex_match( filename, what, rex ) )

  {

    return what[1];

  }



  return "";

}



#include <iostream>



int main()

{

  #ifdef _WIN32

  assert(GetPathBoostFilesystem("C:\\any_path\\any_file.cpp")=="C:\\any_path");

  #else

  assert(GetPathBoostFilesystem("/any_path/any_file.cpp")=="/any_path");

  #endif



  assert(GetPathBoostXpressive("C:\\any_path\\any_file.cpp")=="C:\\any_path");

  assert(GetPathStl("C:\\any_path\\any_file.cpp")=="C:\\any_path");



  assert(GetPathBoostXpressive("/any_path/any_file.cpp")=="/any_path");

  assert(GetPathStl("/any_path/any_file.cpp")=="/any_path");



  for (const auto f: { GetPathStl, GetPathBoostFilesystem, GetPathBoostXpressive} )

  {

    #ifdef _WIN32

    assert(f("C:\\any_path\\any_file.cpp")=="C:\\any_path");

    assert(f("any_path\\any_file.cpp")=="any_path");

    #else

    assert(f("/any_path/any_file.cpp")=="/any_path");

    #endif

  }

}

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(C++) GetPath

Technical facts

Qt project file: ./CppGetPath/CppGetPath.pro

./CppGetPath/main.cpp